We pick k.root-servers.net, one of the 13 root servers (1), and ask it about 10.232.192.200.in-addr.arpa and learn that in-addr.arpa is delegated to six name servers (2), so we ask c.in-addr-servers.arpa where we learn that 200.in-addr.arpa is delegated to eight name servers, including sec1.authdns.ripe.net (3), so we ask that one and learn that 232.192.200.in-addr.arpa is delegated to five name servers (4), so we ask d.dns.br and get the following answer: